Comparative Measurement of Residual Stresses with the Method Based on the Magnetic Barkhausen Noise and the Relaxation Method
نویسندگان
چکیده
For an efficient prediction of residual stresses in a material or a machine part the nondestructive method based on the magnetic Barkhausen noise is, among others, employed in practice. An experimental system developed at home and including measuring and assessment units has proved to be very efficient in various applications of surface hardening or cold hardening, and heat treatment. The present paper treats measurements of residual stresses obtained using the standard relaxation method based on a continuous electrochemical removal and with measurement of deformations with resistance measuring bands in comparison to the determination of residual stresses with the magnetic method based on the Barkhausen noise. A comparative analysis of the results obtained was carried out with flat specimens made of heattreatment structural steel C45E that was, after oil quenching, additionally high-tempered. The residual stresses in a thin surface layer of differently heat-treated and ground specimens were determined using the two methods.
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